Pumping system



March w. E. 'HUBBARD -PuMP-INIG SYSTEM Filed -Juy 23. 1925 Mund' :Mmmm

s Shee's-Sheet 1 wm i,

l ATTORNEY J A )NVENTOA Maul 192 c A `1,619,475 March .1 7, w. E.HUBBARD PUMPING'SYSTEM Filed July 23. 1925 5 Shee'ts-Sheet 5 INVENTOR.

- ATTORNEYS March l 1927.

w. E. HUBBARD PUMPINGA SYSTEM 5 Sheets-Sheet 5 File'd July 23. 1925Patented Mar. 1, 1927.v

, UNITED STATESv WILLIAI l. mm1), OI SAN FRANCISCO, CALIFORNIA, ASSIGNB'10y HUBBABD HACHINI IPAN''A COPABTNEBSHIP CONSISTING 0F WILLIAI E.HUBBABD,

i AND L10I GLOSS, Il., BOTH OII'BAHI FRANCISCO, CALIFORNIA, r. l

PUKPING SYSTEM.

Application led J'illyr, 1925. Serial No. 45,454.

' This invention relates to pumping s stems -and particularly to animproved flui "operated pumping. system. In pumping systems of thereciprocatin type nowin use on oil or other deep wel s considerablepower is necessary, particularly since such power is exertedintermittently, being used only on the up-stroke of thepump.4 The weightof the ump and sucker rods usually is considerab e and this weightoperates the mechanism by gravity: on the downward stroke.-

These intermittently operating systems are obviously very ineicient. Myinvention herein contem lates the use of a continuously operating fluidpressure pump which functions continuousl and with constant force toreciprocate-t e pump rods in the pumping operation. f My inventionherein lis similar to but.. in'- volves improved features over thedisclosure in my coending application Serial No. 27, 728,' filed ay 4,1925. Obviously these improved systems require a smaller pumping unit,since the same o erates continuously, and the operation o such a vsystemis `smoother and more uniform than the intermittently operating systemsand has other material advantages as will hereinafter apear. I p My saidco-pending application comprises agiumping system whereinaboutnine-tenths o the weight ofthe sucker rods and cooperatingmechanism is counterbalaiiced, whereby the surplus energy of thedownward stroke thereof is stored up in the form of a compressed vfluidand which fluid reacts onthe rods on the upward stroke to assist inraising the saine, the one-tenth Weight not counterbalanced being justsufficient to draw the rods down by gravity. Combined with 'the systemis fluid-pressure o rated means vXIII---XIII of for raisingv theone-tenth weig t of the sucker rods not coun-terbalanc'ed and the weightof the oil on the up-stroke, the'sa-idl fluid .preure being provided bya continuously operating pump. e

In my present invention, I not only coun- 'terbalaiice all the weight ofsucker rods and cooperating mechanism, but I furthermore counterbalanceone-half the weight ofthe oil load to be raised. I 'combine with thiscounterbalancing mechanism a double-actingrpower-- means, preferablyfluid operated from a continuously operating pump, whichtion beingoperates on 'the over-counterbalanced rods PATENTqoFFica.

on the downward stroke with a force substantially-equal to the o erationthereon on the up-stroke. Obviou y such a system is.

most -eicient -for various ireasons, such as `smoothness of operationresulting from equal '.force .being exerted in both directions, thepermitting of a long ellicient stroke, etc.

In the accompanying drawing I havel shown one speci yention, but 1t willbe understood thatv the invention can be otherwiseI embodied and thatthe. drawings are not to be construed as defining or ,limiting 'thescope of the invention, the claims appended to' this specificareliedupon for that purpose.

Referring to the-figures of the drawings- Fig. 1 is afront elevation ofvan entire apparatus embodying my invention.

Fig. 2 is an enlarged broken view ofthe .up er half of' Fig. 1. f Y

ig. 3 is a side elevation thereof mostly inl section on line III-III'Fig. 2.

Fig. 4 is an enlarge i lower half of Fig. 1.

Fig. 5 is a side elevation thereof mostly in section onl line V-V, Fig.4.

Fig. 'is a plan section on line Vl--VLl Fig. 4.

Frg. 7 is a top lan view of the apparatus. Fi 8 is a p 'an `sectiontaken on line c embodiment of my in-` broken view of the' Fig. 9 is a frmenta vertical section taken on line IX-a-gIX of 5 Fi 10 is a plansection taken on line X- .-o`f Fig. 12.

Fi 11'isv a plan section taken on line.

XI I of Fig. 2. v

Fig. 12 is' a fragmenta vertical section taken on line XII-XII, lllxig10.

Fig. 13 is a plan section taken on line Fi 18 isa sectional view r.takenonline Referring more 'specifically tothe drawings, 1 indicates .thetube of an oilwell over which is mounted my improved pumpingtherethrough. I

l of 'cylinders 7 is formed 'of four jointsl con-` nected togetherat110,111,iand .12. -r The cyl-` inders 7 Y are '1 in. communicationwith reach i mechanism 2.; 2dis mourted on sup rt'v oc sup rte ona ase/fA Po provides 4an. P

5 on the base 4 Upper Supporting P1frm 6- eA maken@ 2 Q01!! Pair *ifcyflindrical nprights 7 each aving a continuousl ,opening therethroughclosed only at the top cylinders.- serve as fluid ether by a port-13throu i a closure cap 14 on the vtops thereof.nAghp ipe* 15 providesylinder v8 and the lower ends of the cyliners 7. Connections 17 areprovided with ,the bottoms of the cylinders 7 whereby these cylinderscan be drained` or filled with iiuid -underpressure.'@, lThepum rods'18are directly connected to across ead 19 connected by a pair of upwardlyextendin rods 20 to a cross head 21. The cross hea 21 is between thecylin ders 8 and9 andis mounted on the adjacent oo -axial ends. of ftheiston rods 22 and 23 extendin into the cy inders 8 and 9 respectively.

cylinder 8. kA double acting ower' piston 25 v wardl .35 is mountedontherod 23 wit in the cylinder 9. The reciprocation of the parts issteadied bg' a stationary rod 21 extending through tecrosshead21. Theupper end of the hub of the cross head 21 is cupped at 212 and adownwardly extending ole 21l is provided therethrough.y The rod'22extends u wardly through av cupped guiding box 2g having openingsthrough the bottom thereof. The arrangement 1s such that leakage fromthe rod 23 is collectedfin''the cup 21 and drains downthroughthe hole21' into the cup 22. ak'age from the .rod 22" also drains into .the cup22. The drainage runs from vthe cup 22' .into the linder from which itis forced into a co ecting' vchamber 8 by' the piston 24. The chambercan bedrained by a 11 1A's1mplemeans is thereby rovi forlcollecting alldrainage from th rods-22 andi23. I

Thejpower unit furnishing fluid pressurev to the power cylinder l9 maybe mounted on the base 4-'or platform. AAsillustrated*the sameisemountedon the platform 6. This unit l.may be any kind of pump, suchas rotary.,` reciprocating, `tur bin`e centrifugal', etc.

` As illustratedthe same comprises a. rotaryv pump 26 directly drlvenbyamotor .2 7 The intake pipe-28 to thopump is in communication` with Ithebottomof a surge or receiv` to `ernor valve 16, lig

communication between the lower end of theA single actingcounterbalancing piston 24is mounted 4onfthe `rod 22 withinthev ump `isin oommuniatiouwitha rt 31 1n a four-wayvalve32, any air cham r` 30being provided therein. TheV port 33 1s connected by a` ipe 34 to thelower endl ofthe wer cylin er 9. `Thefport'tf is connected by aiduct 36tothe upper endv ofl such c lmder. The exhaust port 37 is connected a pipe'38 to the of the tank 29. A govthe valves shown in my saidco-pending application, is rovided in `this pipe to regulate thejilow oVthe `cylinder 9 to thetank The position ofthe sliding valve" member 39of the valve 32 is controlled byiluidpresi sure through an auxiliarycontrolling rvalve 40 having a sliding cut-oif`element41therein. Thiscontrolling element 41is automati- `cally moved to two' positions bythefollowin mechanism, one of such positions being A in icated in Figs. 16and 18.". A 1inkf42con`` :nects the elementto the free end o fan arm 43mounted on Vthe upper end o fa verticalf shaft 44.` This shaft carriestwo arms 45s l .and 46 having rollers 45 and 4 6 thereonl ada ted to'been d b a cam late 47,0n the I:cross-head QageU id own'vgardl movemento f` the cross-hea ,the cam engages the roller 46 and rotates the rod`in ya. direction to move the element 41 to the position indicated in4Fig.` 16. Uponupward movement of the cross-head, the cam plate engagesthe ingtank 29. The pipe u ,Huid frollll-` 'i roller-45 and rotates the"rod to move fthe'.

element in the opposite direction.l 1. p

The port 31 :from thepump'is connected to the opposite ends `50V and 50,ofthe auxiliary valve' 40; When the element 41 is in the left handposition shownzin Fig. 16, thej fluid under ssure Hows from the chamber50 through uct 51 and `cracking valve 52 to a cylinder 53 and operateson a piston 54 to move the valve member 39 to the left hand positionillustrated. When the element 41 is `moved to the right hand position,the fluid n member 39 to t e right hand position. The

cylinders 53 and 53 ,exhaust through rts 55 and 56, exhaust chamber 57,`and ex aust pon a7: e

10o avdllct andbranch ducts and As illustrated in the drawings, the

rocating mechanism'including ,the iston 25 has just completed thedownwar stroke, the cam 47 has movedthe element 41 to the left'handposition' illustrated, and: the fluid 4pressure through the'duct'l hasmoved the valve `member 39 tothe left. As 'illustrated in Fig. A17, theintake port 31; branches at- 53 and 58' and :is opened atall times totheop- -posite ends of valve-L32 throughA slottedcages A 591 and 59';y`With the parts inthe positigm'- 'l illustrated, .the `fluid flowskthrough the, isotom of the cylinder 9, thus forcing the piston 25 andits connected parts upwardly. During this time, the fiuid in the upperend of the cylinder V9`is escaping through opening 36, port 34, port 61,exhaust chamber 57 ,.exhaust 37, and pipe 38 to the bank 29. The va ve16 regulates the rate of reciprocation and, in case of rod breakage,this valve would prevent the destructive upward movement of thereciprocating parts.

It should be noted that a cylindrical member' 62 is mounted onbothendsof the piston 25. Each end of the cylinder 9 is provided withy apluralit of triangular slots I63 through which t e fluid flows to andfrom the cylinder. The arrangement is such that when the pistonapproaches either end of the cylinder, the member l62 progressivelycovers the openings 63 tol limit the escape of the fluid therefrom,whereby cushioning the ends of the pistonstroke. When the member 62 hascompletely covered the slots 63, the fluid can escape to the outlet pipe34 or opening 36 only through a cracking valve 64, thereby still morecushioning the extreme end of the stroke. A safety relief valve 65 isalso provided in each end of the cylinder 9 for permitting escape of thefluid in cases of emergency. A pipe 66 connects the outlets'of thevalves 65 with the tank 29. It will be clear from the drawings that thelower and u per ends of cylinder 9 each terminates in c ambers 34'l and36a. When the slots 63 are covered, the only outlet from 5 thesechambers is through the cracking valve 64 to the chambers 34" and 36",and through the relief valve 65. y

The operation of my improved system is substantially as follows: In a5,000 foot oil well the pump or sucker rods weigh about 8450 pounds andthe oil load lifted thereby at each upward stroke is about 9500 pounds.It will 4now be assumed that the mechanism is to be used in pumpin sucha well. Fluid under pressure is supp ied to the cylinders 7 suflicieritto raise the piston 24 with a force e ual to the weight of the rods plusone-half oi the weight of the oil load. Thus, this pressure should exertan upward force of 8450 pounds plus 4750 pounds, or 13,200 pounds on thepiston 24. Assuming that the motor`27 and pulnp 26 arev operating andthat the parts are in the positions illustrated, fluid flows from thepump 26 through pipe 30, port 31, cage 59, ports 60 and 33,. and pipe 34to thel bottom of the cylinder 9 and ralse's the piston 25 and pump rodsand said load upwardly. Obviously the load lifted is .one-half the oilload, or 4750 pounds.

Near the upper end of the stroke the cam 47 engages the rolle-r 45 andthrough the shaft 44 moves the element 41 to the right hand position.The fluid thereupon flows through ports 48 and 48', chamber 50', duct51;, cracking valve 52', to cylinder 53', and

operates on piston 54 to move the valve member 39 to the right handposition. The fluid thereupon flows from pump 26 through pipe 30, ports31 and 58', cage 59', ports 61, 35, and 36, to the top of cylinder 9,thus forcing the piston 25 and pump rods downwardly. The pressureexerted thereon is the combination of a cylinder, a piston operatj' ingtherein, a long pump rod connected to the piston, means co-operatingwith the piston and pump rod to overcounterbalance and normally move thesame upwardly Vwith considerable surplus lifting force, a continuouslyoperating pump, pipes connecting the pump with the cylinder at oppositesides of the piston, a valve, and means automatically operating thevalve in timed relation to the piston movement to alternately place thepump in communication with the c linder at the opposite sides of thepiston' throulgh the said pipes.

2. pumping mechanism, comprising the vcombination of a cylinder, apistonl operating therein, a second cylinder having a Apiston operatingtherein and connected to the first piston, means providing fluidpressurenormally operating on the second piston to lift the same upwardly, asource of fluid pressure supply, pipes connecting the same with thefirst cyinder at opposite sides of the piston therein, a valve, andmeans automatically operating thevalve in timed relation to the pistonmovement to alternately place the pump in communication with the first clinden-fat opposite sidesl of the piston t rough the said pipes. f

3. A pumping mechanism comprising the combination of `a cylinder, apiston operating therein, a second cylinder co-axial with the firstcylinder and having a gliston operating therein and connected to t efirst piston, means providing fluid pressure normally operatlng on thesecond piston tolift the same upwardly, a source of fluid pressuresupply, pipes connecting the same with the first cylinder at oppositesides of the piston therein, a valve, and means automatically operatingthe valve in timed relation to the piston movement to alternately placehe pimp @Mmmm wjiuljthe am.

c linden at op site sides of t ro h thesal pipes. Y 4.

. the piston pumpm mechanlsm comprising the combingtion of .a cylinder.,a piston'l ,operaia-V in therein, counterbalancmg means cooperating withpiston 'to normallyfmove `thek piston upwardly, a source of uld pressuresu p1 ',"pipes connecting the same with the cy m er lat opposite sides`of the piston f Lemus `ating t e valve in timed Arelation tothepistoumolvlement` to lace 4the pump in communication with thecy derat ppp@- site sidesnf um piston through the' ma.

pipes, and meanst both ends ofthe c `linder` for controlling'the 'ow of:Huid V ele-v from in axmuinel'vv cushioning the of the

